Back-pedaling brake.



Nu. 64l,983. Patented Jan. 23, I900. A. P. MOBRDW.

BACK PEDALING BRAKE.

(Application filed Aug. 1,1896. Renewad Nov. 1, 1899.)

2 Sheets-Shae! I.

(No Model.)

:1 puoro-uma. WASHINGTON a c He. was. Patented lab. 23, 1900. A. P.MURROW.

BACK PEDALING BRAKE.

(Application filed Aug. 1, 1896. Renewed Nov. 1, 1899.) (No Model.) 2Sheets-8haet 2..

v fu/ent'or M I /MW E S TES PATENT FFIGFL- ALEXANDER I. MORROWT, OFELMIRA, NElV YORK, ASSIGNOR OF ONE-HALF TO HARMON II. FULTON, OF SAMEPLACE.

BACK-*PEDALING BRAKE.

SPECIFICATION forming part of Letters Patent No. 641,983, dated January23, 1900. Application filed August 1, 1896. Renewed November 1,1899.Serial No. 735,557. (No model.)

To aZZ whom it may concern: wheel in place thereon. Fig. is a central Beit known that I, ALEXANDER P. l\IOR- longitudinal section of a modifiedconstruc- ROW, a citizen of the United States, residing tion of axle,hub, and brake mechanism. atElmira,inthecountyof OhemungandState Fig. 11is a side elevation of the hub and 5 of New York, have invented certainnew and brake-sleeve shown in Fig. 10 detached. Fig.

useful Improvements in Bicycle-Brakes; and 12 is a view in perspectiveof the brake- I do declare the following to be a full, clear, sleeve.Fig. 13 is a perspective view of one and exact description of theinvention, such end of the wheel-hub, and Fig. 14 is a vertias willenable others skilled in the art to which cal section on the line a; asof Fig. 10. 10 it appertains to make and use the same, ref- Thereference-numeral lindicates the axle,

erence being had to the accompanying drawthreaded at its ends 2 and 2ings, and to the figures of reference marked 3 indicates the tubular hubof the wheel, thereon, which form a part of this specificaprovided withthe usual annular flanges land tion. 5 for the attachment of the spokes.(Not My invention relates to brake mechanism shown.) for bicycles orlike vehicles; and its primary The brake-sleeve 6 is arranged within theobject is to provide novel and effective means hub 3 and upon the axle1, as shown in Fig. for applying braking friction directly to the 1.Each end of the sleeve 6 is provided with hub of the driving-wheel ofthe bicycle in an annular bearing-box 7, within which are 2ocontradistinction to employing a brake-shoe supported ball-bearings 8 bymeans of conadapted to contact with the wheel-tire, which ical bushings9 and 10. The bushing 9 is inlatter means of braking has been foundobternally threaded to screw upon the threaded jectionable, if notimpracticable, with wheels end of the axle and is provided with anannuequipped with pneumatic tires or other tires lar groove 11 and anannular shoulder12 to re- 25 the material of which is easily abraded bythe ceive a packing-ring 13. The conical bushwearing contact of abrake-shoe therewith. ing 10 projects centrally from a cap 14 at theAfurther object of theinvention is toavoid right-hand end of-the axleand is also centhe use of brake-levers and to control the trally boredand threaded to [it upon the brake mechanism from the pedals by what isthreaded end of the axle. o termed by bicycle-riders back-pedaling.Referring now especially to Figs. 2, 11, and The characteristic featuresof myinvention 13, the hub 3 is provided. at one end with an will befully described hereinafter and deannular extension 15, projectingbeyond the fined in the appended claims. flange 5 and screw-threaded toreceive the In the accompanyingdrawings, which conflanged collar 16 ofthe brake mechanism. 5 stitute a part of this specification, Figure 1The opposite end of the hub 3 is provided is a central longitudinalsection of the hub with an annular extension 17, formed with and axle ofa bicycle driving-wheel with my a series of spiral slots 18, adapted toreceive improvements applied thereto. Fig. 2 is a and interlock with aseries of spirally-disside elevation of the wheel-hub detached and posedteeth 19, formed upon the left-hand end 0 40 having the movablebrake-sleeve arranged of the brake'sleeve 6. Anannular collar 20,therein. Fig. 3 is an elevation of the brakeformed with slots 21,coinciding with the sleeve detached from the hub. Fig. 4 is an spacesbetween the teeth 19, serves as a stop end view of the brake-sleevelooking in the for the sprocket-wheel 22, which is held in direction ofthe arrow in Fig. 3. Figs. 5 and place by the threaded ring 23. Thespiral 5 5 6 are respectively a side elevation and atransteeth 19 arescrew-threaded for the attachverse section of the ring arranged upon thement of the sprocket-wheel and ring 23, and left-hand end of thebrake-sleeve. Figs. 7 each of said teeth is formed with a shoulder and 8are respectively an end view and a side 24, said shoulders all being inthe same verelevation of the cap secured upon the righttical plane toconstitute an annular stop for mo 50 hand end of the axle. Fig. 9 is anend elevathe retaining-ring 23.

tion of the axle and hub with the sprocket- The collar 16, fitting uponthe threaded end of the hub 3, comprises a vertical portion or flangeand a. horizontal tubular portion v 26, which latter is threaded bothinternally and externally, as clearly illustrated in Fig. 1. Theinternal threads of the collar engage the threads of the end 15 of thehub, and its external threads are provided for the attachment of aconical friction-ring 27, preferably made of indurated fiber orequivalent material and internally threaded to fit upon the collar 16.

The cap 14, which fits upon the threaded end 2 of the axle, is providedwith an annular inclined flange 28, extending over the flange 25 of thecollar 16 and shouldered at the point 29 to permit a limited play of thehub and to effect the contact of the cap 14 with the friction-ring 27.

The forks of the vehicle-frame (not shown) are secured to the ends ofthe axle 1 and held by jam-nuts. The outer face of the cap 14 isprovided With a squared projection 30, which is embraced by one of theforks of the frame, and upon the threaded end 2 of the axle is securedthe mounting-step of the machine.

To secure the balls 8 in place at the righthand end of the axle, Iprovide a threaded ring 31, which screws into the collar 16, and athreaded dust-guard ring 32 may be secured within the collar 16 outsideof the ring 31, Fig. 1.

The operation of the mechanism above described is as follows: Theforward rotary movement of the hub, which is interlocked with the spiralteeth of the brake-sleeve, as above explained, permits the free rotationof the friction-ring 27 within the cam 14; but a backward rotation ofthe sprocket caused by back-pedaling at once forces the teeth 19 tomovealong the spiral slots of the hub and forces the hub laterally inthe direction of the arrow in Fig. 1, with the result of forcing thefriction-ring 27 firmly against the beveled flange of the cap 14 toarrest the rotation of the wheel.

The construction illustrated in Figs. 10, 11,

12, and 14 differs from that already described in the location of theflange 20 at the outer end of the sleeve 6 and in forming said flangeWithout the slots 18 required in the construction shown in Fig. 2.Again, instead of extending the flange 28 of the cap 14 over the flange25 of the collar 16 I provide said flange 25 with a horizontal extension25, which extends over the edge of the flange 25.

It is obvious that the extent of movement of the hub may be nicelyadjusted to effect a gradual stopping or slowing of the rotation of thewheel.

Having thus described my invention, what I desire to claim and secure byLetters Patent is 1. In a bicycle or like vehicle, the combi-- nationwith a wheel-hub provided at one end with spirally-disposed slots, of asleeve within the hub enlarged at one end and provided with spiral teethcooperating with the slots in the hub, and threaded to receive thesprocket- Wheel, opposing friction devices on the hub and axle, andmeans for driving the sleeve.

2. In a bicycle or like vehicle, the combination with thespirally-slotted hub, and a toothed sleeve provided withspirally-disposed teeth, of an internally and externally threaded andflanged collar secured upon the threaded end of the hub, a friction-ringsecured upon the collar between the external threads andlaterally-projecting flange, and a cap secured upon the axle andprovided with a flange adapted to clamp the periphery of saidfriction-ring.

In testimony whereof I affix my signature in presence of two witnesses.

ALEXANDER P. MORROI'V.

Witnesses:

Ross M. LOVELL, O. A. WHITE.

